Los Angeles, Feb 19 (IANS): Socialite Paris Hilton spent her birthday in hospital with her boyfriend after he was injured in a skiing accident.

Hilton turned 31 Sunday and she celebrated the day by heading off on a winter vacation at a ski resort in Lake Tahoe, California, with her partner River Viiperi.

However, the holiday ended on bad note when Viiperi fell and cut his leg open. He was taken to a local hospital for treatment, and Hilton stayed by his side, reports contactmusic.com.

She documented the drama in a series of pictures posted on her Twitter page, adding: "Such a scary day on the slopes today. After seeing the gash on River Viiperi's leg, I almost passed out. I have never seen a cut that deep in my life.

"He is so brave, I can't even imagine the pain he went through today. After an eventful birthday weekend in Lake Tahoe, taking off back to Los Angeles."

The couple cut the vacation short and travelled back to Los Angeles.